All the rest work! Actually, I don't know if chio works because I can't
test that. df can be built using NetBSD's mount.h. ps depends on libkvm
so there is no point trying.
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.
Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.